US2548512A - Window blind - Google Patents

Description

April 10, 1951 c. v. BERGSTROM 2,548,512

WINDOW BLIND Filed April 10, 1948 IN V E TOR.

Y Car/ l/Bergszmm ga 0. 'Iwa Att} Patented Apr. 10, 1951 UNITED STATES PATENT W INDOW BLIND Carl V. Bergstrom, Santa Monica, Calif.

Application April 10, 1948, Serial No. 2 0,259

8'Claims. 1

The invention relates to window blinds.

The general object of the invention is to provide a window blind which may be used in place of the more complicated, more expensive and less easily cleaned Venetian blind.

A further object of the invention is to provide an all metal blind of simple and inexpensive construction in which the louvers are integral with or rigidly connected to longitudinally extending corrugated strip members which oncontraction or expansion will move thelouvers to open or closed position.

A further object of the invention is to vprovide in a blind of the character above described means for rendering a portion of the blind inoperative while allowing another portion to be opened and closed.

A further object of the invention isto provide a blind of the character described which may be operated from either the top or bottom of the window.

A further object of the invention is to provide a blind of the character described in which the louvers may be so connected as to be moved in one instance to a closed position on the stretching of the anchoring means and in another instance to an open position when said anchoring means is stretched.

The invention further consists in the several features hereinafter described and more particularly defined by claims at the conclusion hereof.

In the drawings:

Fig. l is a composite front elevation view of a blind embodying the invention in which the left hand half of the figure shows the blind in an open position and the righthand half of the figure shows the blind in a closed position;

Fig. 2 is detailed elevation view of the upper portion of a blind embodying the invention provided with means for operating the same from the top of the blind;

Fig. 3 is a composite view of a blind embodying the invention in which the right and left hand halves of the blind are similar to Fig. 1 and illustrating how only a portionof the blind may be opened and closed;

Fig. 4 is an enlarged composite elevation view of a portion of a blind embodying the invention, the left hand half showing the blind in an open position and the right hand half showing the blind in a closed position;

Fig. 5 is a detailed vertical sectional vie taken on the line 5-5 of Fig. 4;

' Fig. 6 is a detailed vertical sectional view taken on the line 66 of Fig. 4;

Fig. 7 is an enlarged composite elevation view of a portion of a blind embodying the invention 1 in which the left hand half is in a closed. position and the right hand half .is in an open po'-,

sition;

Fig. 8 is" a detailed vertical sectional view taken on the line 8-8 of Fig. 7;

Fig. 9 is a detailed vertical sectional view taken on the line 9--9 of Fig. 7;

Fig. 10 is a detailed vertical sectional view' taken on the line l0l0 of Fig. 4.

Referring to Figs. 1 to 6 of the drawings, the numeral 12 designates a window'frame and I3 figures, the whole blind is formed from a single sheet of suitable sheet metal, such as a suitable.

aluminum alloy, which is subjected to punch pressing operations to slit it transversely at spaced distances to form the louvers and to form the corrugations l8 in the side portions of'said sheet, so that after the pressing operation, the

louvers I! extend at an angle to the corrugated side portions as shown in Fig. 5 and are in an open position, so that when a stretching pressure is imposedon the side portions I6 by pulling outwardly on one end of the sheet, the louvers I! will assume the closed position shown in Fig. 6. The sheet may, as shown in Fig. 1, be anchored at its top portion 14 by screws I9 to the upper portion of the window and be normally held in an open position by studs Z-O-that engage in holes 2| in the bottom portion l5 as shown at the left hand halves of Figs. 1 and 3 and be held in an open position by disengaging it or slipping it off of the studs 20 and pulling it down until the holes 2| may be slipped over studs 22 on the window frame 12 .as shown at the right hand halves of Figs. 1 and 3 or conversely the sheet may be anchored at its bottom portion IE to the window frame and moved and held in its different positions by cords 23 secured to the top portion [4 extending over guides 24 on the window frame and connected to a handle member '25 provided'with a series of notches" 2 6, as shown in Fig. 2, any one of which may engage with a stud (not shown) secured-to the window frame.

Where only partial operation of the blind is desired, the blind may be anchored to the win- OFFICE I j dow frame midway of its length, for example,

as shown in Fig. 3 by screws 21 securing its upper half to the Window frame as shown in Fig. 3.

Where the blind is very wide, the louvers may be connected intermediate their ends by rivets 28, spot welding, or in other suitable manner to one or more longitudinally extending corrugated strips 29 as shown in Figs. 4 and 10, or where it is not desired to form the blind in one piece, separate metal sheets may be used :to form the louvers I1 and strips, similar to the strips 29, may form the sides of the blind frame and carry the louvers as shown in Fig. 10, so that when thesestrips are flexed, the louvers will be movedito a' closed position as shown in Fig. 6.

Instead of pressing or connecting'the' louvers to their corrugated carrying stripssoxthat they are in an open position in the unstretched condition of the corrugated side strips, they may, as

shown in Fig. 8, be disposed to assume a closed position and to 'move to an open position as shown in Fig; 9 when the corrugated side portions are stretched? Where the-corrugated strips are separate, theymay be for-med of a different,- metal from the louvers, for example, fiat spring steel stripsn It is to be noted that so long a the-niarginal corrugated'sid'e strips or'portions IG are properly anchored at one end, the trans-verseportion- M or I5 at thisanchoredtend is not absolutely essential. From the above it will'be-noted that l have provided a blind of'simple andinexpensive'construction and one which may be easily cleaned either by a vacuum cleaning or by taking it down and washing it with a pressure spray.

It'is also to be. noted that while the corrugated part of the blind maybe metal, it-isnot necessarily limited thereto" as any suitable material such' as a plastic or rubber composition which has therequisite spring tension maybe used. in

the corrugated part oflthe blind.

I desire it to be understood that'this invention isnot'to be limited to any particularform or arrangement of partsexcept in so far as such .limitationsare includedin the claims.

What I'claim as my. invention is: v

, 1 In a window blind; the combination with marginal contractible and -expandible corrugated side 'strips or" flexible metal, ofaseries ofspaced louvers anchoredto said strips-betweenithe crests ofrthe corrugations of said stripsand movable by said strips-to difierent positionslon the stretching 1 orcontractionof said=stri1es are-contracted and extend at an acute angle to the sides .of the. corrugations of said strips in theirclosed position when said side strips are stretched;

6. A window blind in accordance with claim} wherein the louvers extend at an acute angle to the sides of the corrugations of said strips in their closed position'when said sidestripsare contracted and extendlaterally at an'obtuse angle-to the sides of thecorrugations of'saidstrips" in their open position when said side strips are;

stretched.-

7; In a=window blind, the combination with a window frame of marginal corrugated side strips of resilient metal anchored at one of their ends to said-frame, aseries of-spaced louvers anchored to saidstrips-between the crests of'their corrugations, and'means-for anchoring theoth'er ends' of' said strips to said frame in stretched and un-' stretched condition.

8. A window blind in accordance with claim 7 wherein-theside' strips are also anchored at" an intermediatepoint to the frame so that only-a portion of the blind is adapted to be moved on thestretchingand'unstretchingof the stripsfrom one end of saidframe; CARL V. BERG S'IROM;

REFERENCES CITED The. followingereferences are of record. in the file of thispatent:

UNITED: STATES PATENTS Number Name Date 1,411,866 Morris -l Apr. 4, 1922' 1,937,342 Higbie Nov. 28, 1933 2,093,093

Mongus Sept. 14, 1937'

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